Processor Upgrade

In the process of upgrading the PII400Mhz CPU to 600Mhz, we purchased the Compaq 600Mhz processor kit, part number 155592-001 SPS-PROC, PIII,600/100, W/HTSNK. It only contained the processor, there was no processor power module included. Have we been given the wrong kit? or did I order the wrong kit.. Also the PII400 model 1850R only shows processor settings for 350Mhz,400Mhz and 450 Mhz. Where do I get the settings for 600Mhz? I understand that we will need a Thermal Kit. Tnks